public class test {
 public static void main(String[] args) throws IOException
 {
  Scanner in=new Scanner(System.in);
  System.out.println("input year");
  int year=in.nextInt();
  System.out.println("input month");
  int month=in.nextInt();
  System.out.println("input day");
  int day=in.nextInt();
  System.out.println("your input ls "+year+"."+month+"."+day);
  System.out.println("the next day ls "+nextDay(year, month, day));
} 
 static String nextDay(int year,int month,int day)
 {
  String nextd="";
  int dayfab=28;
  int dayusual=30;
  if((year%4==0 && year%100!=0) || (year%400==0))
   dayfab=29;
  if(month==1||month==3||month==5||month==7||month==8||month==10)
   dayusual=31;
  
  if(month==12)
  {
   if(day==31)
    nextd=add(year+1, 1, 1);
   else if(day<dayusual)
    nextd=add(year, month, day+1);
   else if(day>dayusual)
    nextd="error day data";
  }
  else if(month==2)
  {
    if(day<dayfab)
     {nextd=add(year, month, day+1);}
    if(day==dayfab)
     {nextd=add(year, month+1, 1);}
    if(day>dayfab)
     {nextd="error day data";}
  }
  else if(month>12)
  {nextd="error month data";}
  else
  {if(day==dayusual)
   nextd=add(year, month+1, 1);
  else if(day<dayusual)
   nextd=add(year, month, day+1);
  else if(day>dayusual)
   nextd="error day data";
  }return nextd;
   }
  
 static String add(int year,int month,int day )
 {
  String time=Integer.toString(year)+"."+Integer.toString(month)+"."+Integer.toString(day);
  return time;
 }
}
